EP0806215A2 - Vorrichtung zur Rückgewinnung von Narkosemittel - Google Patents

Vorrichtung zur Rückgewinnung von Narkosemittel Download PDF

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Publication number
EP0806215A2
EP0806215A2 EP97301085A EP97301085A EP0806215A2 EP 0806215 A2 EP0806215 A2 EP 0806215A2 EP 97301085 A EP97301085 A EP 97301085A EP 97301085 A EP97301085 A EP 97301085A EP 0806215 A2 EP0806215 A2 EP 0806215A2
Authority
EP
European Patent Office
Prior art keywords
anaesthetic agent
anaesthetic
patient
receiving
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97301085A
Other languages
English (en)
French (fr)
Other versions
EP0806215B1 (de
EP0806215A3 (de
Inventor
Michael Ernest Garrett
Ronald Hughes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOC Group Ltd
Original Assignee
BOC Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOC Group Ltd filed Critical BOC Group Ltd
Publication of EP0806215A2 publication Critical patent/EP0806215A2/de
Publication of EP0806215A3 publication Critical patent/EP0806215A3/de
Application granted granted Critical
Publication of EP0806215B1 publication Critical patent/EP0806215B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
    • A61M16/009—Removing used or expired gases or anaesthetic vapours
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/1065—Filters in a path in the expiratory path

Definitions

  • the present invention relates to an apparatus for recovering an anaesthetic agent and relates particularly, but not exclusively, to such an apparatus for recovering anaesthetic agent exhaled by a patient.
  • the invention also relates to a method of recovering anaesthetic agent exhaled by a patient.
  • the present invention provides an apparatus for recovering an anaesthetic agent exhaled from a patient, the apparatus comprising a buffer vessel, for receiving a patients exhalation and for temporarily storing the same; a compressor, downstream of the buffer and operably connected thereto for receiving and compressing exhaled gas; separation means, for receiving compresses exhaled gas and for separating said anaesthetic agent therefrom, said separation means comprising a membrane separation apparatus operably connected to receive compressed exhaled gas to its tube side and being configured for allowing said anaesthetic agent to pass through the membrane to the shell side thereof, said separation means further including a first outlet for receiving pressurised gas depleted in anaesthetic agent and a second outlet for receiving said separated anaesthetic agent and for directing it to a region other than the atmosphere surrounding the patient.
  • the region comprises an anaesthetic supply means for supplying anaesthetic to the patient, thereby to provide for recycling of said separated anaesthetic agent.
  • the apparatus further includes disposal means operably connected to the first outlet of the separation means or directing pressurised gas depleted the anaesthetic agent for release to atmosphere at a point remote from the atmosphere surrounding the patient.
  • the apparatus includes pressure sensor means for monitoring the pressure within the buffer and for causing operation of the compressor only upon detection of a pressure above about atmospheric pressure.
  • the apparatus further includes control means for receiving a signal from said pressure monitor and for initiating control over the operation of the compressor as and when necessary.
  • the compressor is operable to compress the exhaled gas to a pressure equal to or greater than 1 atmosphere gauge.
  • the apparatus includes a gas analyser operably connected to monitor the purity of separated anaesthetic agent and being operably connected to an anaesthetic supply apparatus such as to enable recycled anaesthetic agent to be re mixed with make-up oxygen and fresh anaesthetic agent for supply to the patient.
  • the buffer vessel comprises a collapsible/expandable bag buffer.
  • the anaesthetic agent comprises nitrous oxide.
  • an anaesthetic supply apparatus 10 supplies oxygen 12 and anaesthetic agent 14 to control valves 16 and 18 before these components are mixed and directed along supply line 20 to a patients breathing mask 22.
  • the patients exhalation is withdrawn via line 24 and directed to a buffer vessel 26 in the form of, for example, a collapsible/expandable bag buffer.
  • a pressure sensor 28 acts to a monitor the pressure within the buffer 26 and provides a signal to a pump controller 30 via line 32.
  • a pump 34 situated downstream of buffer 26 is operably linked to pump controller 30 which initiates control and operation of the pump only upon detection of a pressure within the buffer equal to or greater than 1 atmosphere gauge.
  • Line 36 is provided for withdrawing exhalation from buffer 26 and directing it to pump 34. Once compressed, the exhalation is directed via line 38 to a separation apparatus shown generally at 40.
  • the separation apparatus 40 comprises a membrane separation apparatus operably connected to receive compressed exhaled gas to its tube side 42 and being configured for allowing said anaesthetic agent to pass through the membrane 44 to the shell side 46 thereof from which it may be withdrawn in a manner to be described later herein.
  • a first outlet 48 is provided for receiving pressurised gas depleted in anaesthetic agent and for directing it to line 50 for subsequent disposal.
  • a second outlet 52 is provided for receiving separated anaesthetic agent and for directing it to line 54 which conducts the separated anaesthetic agent to a region other than the atmosphere surrounding the patient.
  • this region might be any area other than that in which the operating staff are situated, it will conveniently comprise the anaesthetic supply apparatus itself in which case the recycled anaesthetic agent may be used once again.
  • a gas analyser purity monitor 56 and control apparatus 58 which initiates control over the introduction of recycled anaesthetic via valve 60 and modifies the flow rate of new anaesthetic agent via control valve 18. If necessary, control may also be initiated over oxygen supply valve 16.
  • line 62 is provided for supplying a signal to controller 58 from monitor 56 and lines 64 to 68 are provided for initiating control over valves 16, 18 and 60.
  • pump 34 may be operated to pressurise the exhaled gas to a pressure somewhat greater than that described above thereby facilitating the provision of compressed recycled anaesthetic agent to anaesthetic supply apparatus 10.
  • a further advantage of the present invention resides in the fact that items such as dust and bacteria will be retained within the membrane rather than past pack to the anaesthetic supply. Such a membrane may therefore be used on a number of patients without presenting a biological hazard. Alternatively, such separation apparatus are comparatively inexpensive to produce and hence a fresh unit may be provided for each and every patient.
  • the present invention may be employed with any one a number of anaesthetic agents, it has been found to be particularly suitable for use with nitrous oxide.
  • the invention also relates to a method of recovering an anaesthetic agent from a patient's exhalation, and that many of the apparatus features described above are equally directly applicable to said method.

Landscapes

  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Biomedical Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Hematology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP97301085A 1996-04-17 1997-02-20 Vorrichtung zur Rückgewinnung von Narkosemittel Expired - Lifetime EP0806215B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9607968 1996-04-17
GBGB9607968.6A GB9607968D0 (en) 1996-04-17 1996-04-17 Apparatus for recovering an anaesthetic agent

Publications (3)

Publication Number Publication Date
EP0806215A2 true EP0806215A2 (de) 1997-11-12
EP0806215A3 EP0806215A3 (de) 1998-07-01
EP0806215B1 EP0806215B1 (de) 2004-06-30

Family

ID=10792226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97301085A Expired - Lifetime EP0806215B1 (de) 1996-04-17 1997-02-20 Vorrichtung zur Rückgewinnung von Narkosemittel

Country Status (6)

Country Link
EP (1) EP0806215B1 (de)
AU (1) AU1636697A (de)
DE (1) DE69729687T2 (de)
GB (1) GB9607968D0 (de)
NZ (1) NZ314400A (de)
ZA (1) ZA972951B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2789600A1 (fr) * 1999-02-17 2000-08-18 Air Liquide Procede et installation de recuperation et/ou de purification du protoxyde d'azote contenu dans un gaz-dechet
WO2001024858A2 (de) 1999-10-02 2001-04-12 Messer Griesheim Gmbh Gassammeleinrichtung
FR2809963A1 (fr) * 2000-06-07 2001-12-14 Ricardo Carbajal Systeme d'evacuation de protoxyde d'azote
WO2002030549A1 (de) * 2000-10-13 2002-04-18 Basf Aktiengesellschaft Verfahren zur abtrennung von distickstoffmonoxid aus wasserstoff, stickstoffmonoxid und distickstoffmonoxid enthaltenden gasen
WO2008012350A1 (de) * 2006-07-26 2008-01-31 Klaus Schmidt Rückhaltung von edelgasen im atemgas bei beatmeten patienten mit hilfe von membranseparation
US10076620B2 (en) 2012-12-22 2018-09-18 Dmf Medical Incorporated Anesthetic circuit having a hollow fiber membrane

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592191A (en) * 1969-01-17 1971-07-13 Richard R Jackson Recovery of anesthetic agents
DE3513628C1 (de) * 1985-04-16 1986-10-23 Brugger, Inge, geb. Ritzau, 8130 Starnberg Vorrichtung zum Inhalieren von Allergenen
WO1994002190A1 (de) * 1992-07-23 1994-02-03 Johannes Geisen System und verfahren zum kontrollierten zuführen oder abführen von atemluft
DE4340764A1 (de) * 1993-06-14 1994-12-15 Gerhard Dr Med Schwarzmann Halboffenes Anästhesiesystem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592191A (en) * 1969-01-17 1971-07-13 Richard R Jackson Recovery of anesthetic agents
DE3513628C1 (de) * 1985-04-16 1986-10-23 Brugger, Inge, geb. Ritzau, 8130 Starnberg Vorrichtung zum Inhalieren von Allergenen
WO1994002190A1 (de) * 1992-07-23 1994-02-03 Johannes Geisen System und verfahren zum kontrollierten zuführen oder abführen von atemluft
DE4340764A1 (de) * 1993-06-14 1994-12-15 Gerhard Dr Med Schwarzmann Halboffenes Anästhesiesystem

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2789600A1 (fr) * 1999-02-17 2000-08-18 Air Liquide Procede et installation de recuperation et/ou de purification du protoxyde d'azote contenu dans un gaz-dechet
EP1029578A1 (de) * 1999-02-17 2000-08-23 L'air Liquide Société Anonyme pour l'étude et l'exploitation des procédés Georges Claude Verfahren und Anlage zur Wiedergewinnung und/oder Reinigung von Distickstoffoxyd in einem Gas
US6348083B1 (en) 1999-02-17 2002-02-19 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and installation for the recovery and/or purification of the nitrous oxide contained in a waste gas
WO2001024858A2 (de) 1999-10-02 2001-04-12 Messer Griesheim Gmbh Gassammeleinrichtung
WO2001024858A3 (de) * 1999-10-02 2001-10-18 Messer Griesheim Gmbh Gassammeleinrichtung
FR2809963A1 (fr) * 2000-06-07 2001-12-14 Ricardo Carbajal Systeme d'evacuation de protoxyde d'azote
WO2002030549A1 (de) * 2000-10-13 2002-04-18 Basf Aktiengesellschaft Verfahren zur abtrennung von distickstoffmonoxid aus wasserstoff, stickstoffmonoxid und distickstoffmonoxid enthaltenden gasen
WO2008012350A1 (de) * 2006-07-26 2008-01-31 Klaus Schmidt Rückhaltung von edelgasen im atemgas bei beatmeten patienten mit hilfe von membranseparation
US8763610B2 (en) 2006-07-26 2014-07-01 Klaus Schmidt Retention of noble gases in the exhaled air of ventilated patients by membrane separation
US10076620B2 (en) 2012-12-22 2018-09-18 Dmf Medical Incorporated Anesthetic circuit having a hollow fiber membrane
US10960160B2 (en) 2012-12-22 2021-03-30 Dmf Medical Incorporated Anesthetic circuit having a hollow fiber membrane

Also Published As

Publication number Publication date
DE69729687T2 (de) 2005-06-30
GB9607968D0 (en) 1996-06-19
AU1636697A (en) 1997-10-23
EP0806215B1 (de) 2004-06-30
NZ314400A (en) 1998-05-27
DE69729687D1 (de) 2004-08-05
ZA972951B (en) 1997-11-03
EP0806215A3 (de) 1998-07-01

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